Add Code Here/JAVA/Selective Calculator/Calculator.java
<filename>Add Code Here/JAVA/Selective Calculator/Calculator.javapublic class Calculator implements IntfA {
    public double add(double a, double b) {
        return a + b;
    }

    public double sub(double a, double b) {
        return a - b;
    }

    public double mul(double a, double b) {
        return a * b;
    }

    public double div(double a, double b) {
        return a / b;
    }

    public double mod(double a, double b) {
        return a % b;
    }
}
